A former swim coach has been indicted in the death of a Texas teen who drowned during practice.

Authorities arrested Tracey Anne Boyd, 49, and charged her with abandonment and endangering of a child by criminal negligence, a state jail felony.

Elise Cerami, 13, drowned during a swim club practice at the Carroll Independent School District Aquatic Center in June 2016.

Boyd, at the time, was an assistant swim coach for the advanced North Texas Natadores, which is owned by the Carroll Independent School District.

The indictment against her alleges that she failed to 'watch or observe Elise Cerami while [Cerami] was swimming' and failed to ensure that she was being supervised by someone else.

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Tracey Anne Boyd, 49 (left), has been charged with'abandonment and endangering of a child by criminal negligence in the drowning of 13-year-old swimmer Elise Cerami (right) in June 2016 in Caroll, Texas

The indictment against Boyd charges that she 'failed to watch or observe Elise Cerami while [Cerami] was swimming' and failed to ensure that she was being supervised by someone else during morning warm-up

It remains unclear why Cerami sank after a warm-up session at the aquatic center around 6.45am.

When her teammates realized she hadn't surfaced, they pulled her out.

Bill Christensen, another swimming coach, suffered symptoms of a heart attack after attempting to perform CPR on the teen before paramedics arrived, reported NBC5.

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Christensen survived his episode, and has not been charged with a crime.

Cerami was first taken to Baylor Regional Medical Center in Grapevine before being transferred to Cook Children’s Medical Center in Fort Worth, where she was pronounced dead.

The Tarrant County medical examiner's office ruled Cerami's death as an accident.

The youngster, who was in the advanced North Texas Nadadores club, was pulled from the water so staff could perform CPR. Cerami was taken to the hospital but died a short time later (Pictured left and right, undated)

Cerami's parents have been pushing the Carroll school board meeting for higher safety standards at the district’s aquatics center, including having swim coaches receive lifeguard training through the American Red Cross (Pictured, Cerami)

Her coach, Bill Christensen, who tried to save her life then collapsed at the side of the pool at the Carroll school district Aquatics Center (above) after suffering a heart attack

The Cerami family released a statement Wednesday evening in response to the indictment.

'The charge against Tracey Boyd describes her conduct and we believe that the district attorney will devote the full resources of their office to the case against Boyd,' it read in part.

'While the court system proceeds with the grand jury's indictment, our efforts will continue in water safety and drowning prevention,' the Cerami family statement read.

Cerami's parents have been pushing the Carroll school board meeting for higher safety standards at the district’s aquatics center, including having swim coaches receive lifeguard training through the American Red Cross.

In addition, the family has launched a safety awareness campaign via the Swim4Elise Foundation.